Abstract: The improved tire gauge of the present invention provides a multi-functional tire testing tool capable of determining the tire tread depth, measuring the tire pressure, and removing and replacing the tire stem cores from the tire valve. The tire tread depth checker and a stem removing element are attached to a conventional tire gauge. The tire tread depth check has an indicator probe which is positionable between the tire treads and which slidably engages the cylindrical body of the conventional tire gauge. A linear scale on the cylindrical body cooperates with the probe to provide a measurement of the tire tread thickness. A stem core removing element is attached to the top portion of the tire valve engaging head of the conventional tire gauge. The stem core removing and replacing element has a rod like element with an axial bore and slot at the bore opening for receiving the tire stem.

Abstract: A differential pressure gauge 10 utilizes a piston member 18 provided with a series of grooves 19 right around it, so that the piston member 18 itself forms the rack of a rack-and-pinion device (pinion 22) for converting linear displacement of the piston member into rotary displacement of the pinion. For sensitivity and accuracy, the seal between the piston member 18 and the passage 13 is a hard-surface-to-hard-surface engagement between substantial (total) hard surface areas at any one time of the passage 13 and the piston member 18, including regions of the surface area of the piston member 18 intermediate mutually adjacent end ones of the grooves 19. In this way, the gauge is insensitive to the base pressure, there being no soft seals to deform under pressure. A magnetic coupling is used through the wall of the housing, which can thus be made completely pressure-tight.

Abstract: A tire pressure indicator for visual observation of tire pressure including a screw-on cartridge containing a spring-biased piston with a movable shield which covers a central indicator pilot when tire pressure is up to requirements. When pressure is below what it should be, the piston retracts to allow the shield to expose indicator pilot to the view of an observer, thus serving as a warning that inflation is required.

Abstract: An apparatus for measuring forces comprises a coil spring within a body; a movable part within the body, the movable part being subjected to the action of the force to be measured and being in contact with one end of the coil spring; a needle on a dial which makes it possible to visualize the correlation between the position of the movable part within the body and the value of the force; an adjustment sleeve within the body with an external thread which can be screwed into an internal thread of the body, the adjustment sleeve being in contact with the other end of the coil spring; the adjustment sleeve has an internal thread within which the coil spring can be screwed; and the external and internal threads of the adjustment sleeve have the same pitch.

Abstract: A hydraulic accumulator unit having a volume variable against the force of a spring and a restrictor are provided for eliminating slow pressure fluctuations in a measuring instrument responsive to fluid pressure, through which restrictor the hydraulic accumulator unit is connected to the fluid subjected to the pressure fluctuations. The measuring instrument measures the pressure in the accumulator unit.

Abstract: A pressurizing syringe includes one or more dimple-shaped snapdomes located between the plunger and piston of a syringe assembly. When the plunger is depressed, the snapdomes will deflect at a known pressure level, giving the user a tactile and audible indication that the syringe is compressing fluid at the desired pressure. A method for using a pressurizing syringe to pressurize the fluid-filled compartment of an ultrasonic scan head is also described.

Abstract: A pressure indicator, particularly for respirators, comprises a housing which has a pressure chamber, is connectable to a pressure source, for example a respirator gas pressure and includes a plurality of individual indicator chambers which is connected to the pressure chamber with an indicator piston member slidable in each of the chambers and biased by individual springs in a direction which brings a feeler portion of the indicator piston member within the housing. The feeler portion extends out of the housing in an indicating position which position is arrived at by pressure in the pressure chamber acting on the indicator piston to force it out of the housing. Each indicator piston member is biased by a biasing force, for example, produced by a selected spring so that it will be in a non-indicating position until a distinct pressure acts on the indicator piston member to force it in a position in which the feeler portion thereof extends out of the housing.

Abstract: An air filter restriction indicating device communicating with the supply of air passing from an air filter to the air intake of an internal combustion engine. The indicating device senses a decrease in the supply of air drawn through the air filter by the engine based upon changes in the amount of vacuum in the negative side of the air supply, the amount of restriction being indicated by the movement of an indicating device. Improved means included in the indicating device senses the movement of the indicating device and progressively locks the indicating device into various indicating positions as the vacuum increases due to an increased restriction of the filter, so that the maximum reading of restriction achieved during engine operation remains visible to the operator or maintenance personnel even after the engine is turned off.

Abstract: An easily calibrated indicating device for monitoring pressures or other parameters that vary, comprising a housing having a scale plate with indicia representing a range of values, and an indicating member movable over the scale plate, for designating various values thereon. A driving permanent magnet is movable in the housing, and responds to changes in the parameter being measured. A movable follower permanent magnet is also provided in the housing, for reacting with the driving magnet, the follower magnet in turn being connected to the indicating member so as to shift the same in response to movement of the driving magnet. A third, trim or calibration permanent magnet is provided, which alters the reaction between the first two magnets, thereby enabling either an expansion or else a contraction of the range of movement of the indicator member to be had as it responds to a predetermined change in the condition being measured.

Abstract: A force transducer, particularly for the ballistic measuring of the combustion pressure in the cartridge case of a firearm, is disclosed which includes a force transmission element which rests with one of its front areas on the cartridge case. The force transmission element is surrounded on its exterior by an outer sleeve which also rests with its front area on the cartridge case. The front areas of the force transmission element and of the outer sleeve are exactly adapted to the curvature of the cartridge case by reaming after the transducer has been mounted in the firearm. With the combustion of the powder, the cartridge case expands and transmits its force to a sensor element via the force transmission element, with the sensor element being preferably in the form of at least one piezoelectric transversal quartz element which is held under pretension between the force transmission element and a basic receiver component.

Abstract: A suction bottle for evacuating secretions from wounds is disclosed. The bottle includes a vacuum indicator arrangement located over a pressure opening 6 in the bottle, a sealing tube 7, a return spring 9, and a graduated scale bearer 10. In response to changes in pressure within the bottle, abutment 8 is caused to travel within graduated scale bearer 10, thus indicating the pressure within the bottle.

Abstract: A versatile filter structure adaptable for use in differently ported configurations includes accommodation for variations of bypass and shutoff valving and for filter element replacement from either end or centrally of the structure. A head casting is secured to a tubular housing and either may be the mounting device for the filter. A funnel shaped diverter having an oblique edge is removably mounted in the head casting and provides separation between inlet and outlet portions of the filter structure by means of an eliptical o-ring seal at the edge which engages the interior of the head casting. The diverter provides a smooth transition for fluid flow to the interior of the filter, supports one end of the filter element in the tubular housing, optionally houses a shutoff valve operative automatically upon filter element removal, and further houses a bypass valve for safeguarding against filter element blockage.

Abstract: Fluid pressure indicating apparatus which may comprise: a body assembly adapted for connection to a source of fluid pressure; an indicator assembly attached to the body assembly for indicating magnitude of the fluid pressure; a transducer assembly carried by the body assembly for translating pressure applied to one side thereof to linear motion at the opposite side thereof; and an amplification assembly carried by the body assembly between the transducer assembly and the indicator assembly for amplifying the linear motion of the transducer assembly to increased motion at the indicator assembly in predetermined relationship with the pressure magnitude of the source of fluid pressure.

Abstract: A high temperature pressure gauge comprising a pressure gauge positioned in fluid communication with one end of a conduit which has a diaphragm mounted in its other end. The conduit is filled with a low melting metal alloy above the diaphragm for a portion of its length with a high temperature fluid being positioned in the remaining length of the conduit and in the pressure gauge.

Abstract: A simplified downhole pressure reading instrument. It has a cylindrical body which holds a charge of gas at one end. There is a concentric cylindrical element which slides longitudinally inside the body with a low friction seal between them. The body has an opening at the other end from the gas charge, to admit the downhole fluid pressure. And, there is an arrangement for taking a reading of the maximum compression of the gas charge by the longitudinal movement of the inner cylindrical element.

Abstract: An apparatus for use with pressurized fluid supply lines which will electrically shut down a fluid pump and the machinery to which the fluid is furnished whenever a predetermined pressure drop occurs in a fluid supply line from the pump. The apparatus provides a visible indication when it is actuated by the predetermined pressure drop, so that when a series of the apparatus is used in an installation, for a plurality of lubricators or the like, the operator can readily determine which apparatus of the series was actuated by the pressure drop. Additionally, this apparatus has means for attracting and holding foreign magnetic particles in the pressurized fluid flowing through the apparatus.

Abstract: Opposing hydraulic rams are supported in cylinders on cylinder beams connected together and then connected with a intermediate resistance beam by low yield connection bars, thereby reducing shearing stresses at the foundation. Hydraulic controls operate rams in the first mode to clamp an axle between opposing rams or to release a clamped axle. In one driving mode one ram drives the clamped axle, which, in turn, drives the other ram axially in one direction. In the other driving mode the other ram drives the one in the opposite direction. In demounting members, the resistance beam or extensions bear against a member pressed onto the axle to restrain such member as the axle continues to move through until the member is loosened. In mounting members, opposition to axial movement of such a member loosely on the axle or ram extensions is provided by a yoke extension of the cylindrical beam to cause said members to be pressed onto the axle as the axle continues to move.

Abstract: The pressure indicator has a body provided with an attachment shank having a pressure fluid passage. A cylinder bore is located at one end of the body and communicates with the passage. An end plug having a bore and a counterbore is threaded into the body. The bore terminates at the plug inner end in a first annular flat abutment surface. The counterbore terminates in a second annular flat abutment surface which is located between the inner and outer ends of the plug and forms one end of the plug bore. A piston is nested in the cylinder bore having a piston rod axially extending through the cylinder bore and projecting through and outwardly of the plug. A compression spring is interposed between the plug and piston and yieldably biases the piston towards one end of the cylinder bore. The piston is variably movable longitudinally against the spring on application of pressure to the pressure fluid passage.

Abstract: The pressure indicator has a body provided with an attachment shank having a pressure fluid passage. A cylinder bore is located in the body and communicates with the passage. An end plug having a bore and a counterbore is threaded into the body. A piston is nested in the cylinder bore and has a piston rod axially extending through the cylinder bore and projecting through and outwardly of the plug. A compression spring is interposed between the plug and piston and yieldably biases the piston towards the fluid passage against the pressurized fluid. The improvement resides in the provision of a backup bushing nested within the plug bore which axially and guidably receives the piston rod. A cylindrical slide seal of a permanently lubricated material is nested within the plug bore and projects into and depends from the bushing in sealing engagement with the piston rod.

Abstract: The vacuum indicator has a body with an attachment shank having a fluid passage. A cylinder bore is located in the body and communicates with the passage. An end plug having a bore and a counterbore is threaded into the body. The bore of the end plug terminates at the inner end in a first annular flat abutment surface which faces one end of the body. The counterbore terminates in a second annular flat abutment surface which is located between the inner and outer ends of the plug and forms one end of the plug bore. A piston is nested in the cylinder bore and has a piston rod secured thereto, with the piston rod projecting axially through and outwardly of the end plug. An annular bearing element is located in the plug bore and surrounds the piston rod. The piston has an annular end surface facing the first abutment surface. A compression spring is interposed at its ends between one end of the cylinder bore and the piston and yieldably biases the piston towards the first abutment surface.

Abstract: This invention provides a pressure transmitting and sealing apparatus between a high or low pressure fluid line and a gauge monitoring the pressure of the fluid in the line. This apparatus transmits pressure fluctuations between the measured fluid and a dissimilar fluid in the standing line connected to the measuring gauge. The invention is particularly applicable in instances where the ambient temperature is below the freezing point of the measured fluid and a non-freezing fluid is required in the standing line and gauge. The apparatus comprises an in-line piston and cylinder unit which transmits variations in the pressure in the measured line to the fluid in the standing line to the gauge, while maintaining separation of the two fluids and at the same time allowing the non-freezing fluid in the standing line to lubricate the piston and cylinder. In the event of a break in the standing line, the piston will prevent leakage from the measured fluid line.

Abstract: A vacuum packing apparatus utilizes a container lid for attachment to a container having food therein. The lid is provided with a check valve having a hose fitting which provides a source of vacuum to the container. The lid carries an indicating apparatus whose housing is attached to the lid and gaseously communcating to the container associated therewith. A coil spring is mounted in the housing and biases a piston rod outwardly from the housing. The rod of the piston carries indicia suggesting the vacuum level within the container. One embodiment provides a novel valve apparatus suitable for allowing the container to achieve atmospheric pressure upon simple manual manipulation thereof.

Abstract: A magnetic differential pressure indicator is provided for detecting and indicating a pressure differential thereacross that is greater than a predetermined value in a fluid system, having a port that permits introduction or withdrawal of fluid for testing of operability under the predetermined pressure differential, and having a bimetallic element that prevents false actuation of the element at abnormal temperature, and a deactuator for the bimetallic element that permits such testing of the indicator via the port for operability even at such abnormal temperature.

Abstract: The pressure indicator has a body provided with an attachment shank having a pressure fluid passage. A cylinder bore is located at one end of the body communicating with the passage and has a threaded open end. An end plug having a bore and a counterbore is snugly threaded into the open end. A piston is nested in the cylinder bore and has a piston rod axially extending through the cylinder bore and projecting through and outwardly of the plug. A compression spring is interposed between the plug and piston and yieldably biases the piston towards said one end of the cylinder bore. The piston is variably movable longitudinally against the spring on application of pressure to the shank passage. A bearing or bushing is nested within the plug bore and axially and guidably receives the piston rod.

Abstract: The pressure indicator has a body provided with an attachment shank having a pressure fluid passage. A cylinder bore is located at one end of the body communicating with the passage and has a threaded open end. An end plug having a bore and a counterbore is snugly threaded into the open end. A piston is nested in the cylinder bore and has a piston rod axially extending through the cylinder bore and projecting through and outwardly of the plug. A compression spring is interposed between the plug and piston and yieldably biases the piston towards said one end of the cylinder bore. The piston is variably movable longitudinally against the spring on application of pressure to the shank passage. The improvement resides in the provision of a bushing nested within the plug bore which axially and guidably receives the piston rod. A cylindrical slide seal of plastic material is nested within the plug bore and projects into and depends from the bushing in sealing engagement with the piston rod.

Abstract: A visual tire valve is adapted for mounting over a tire valve stem and includes a stem housing at one end mounted upon said valve stem, has an elongated bore intermediate its ends and an exteriorly threaded barrel at its other end having a counter bore. An axially apertured bolt is slidably nested within said bore and has three annular bands of different colors upon its exterior for indicating over inflation, proper inflation and under inflation with respect to a window in said stem housing. A second housing having an internally threaded bore is adjustably mounted upon and along said barrel and supports therein a stem having a normally closed longitudinal bore whose inner end extends into the second housing bore and partly into said counter bore and whose outer end projects from the second housing. A spring is interposed in compression between said bolt and stem. A normally seated spring-biased air flow control rod is disposed within said stem closing off air communication therethrough.

Abstract: An apparatus for indicating at the surface, the subsea well head pressure including; a reservoir, a subsea hydraulic transmitter, a pump to pump hydraulic fluid from reservoir to the subsea hydraulic transmitter, a pressure gauge connected at the surface in the line from the pump to the transmitter, means connecting the transmitter to said reservoir, means for connecting the transmitter to the well head whereby well head pressure is delivered to the transmitter, the transmitter being located on the subsea well head equipment, a flow controlling restrictor connected between the pump and the pressure gauge and the transmitter, the transmitter having a body with a bore at one end and a counterbore at the other end, a piston slidable in said bore and connected to a diaphragm in the counterbore, the piston being exposed to well head pressure, the diaphragm being exposed to pump pressure on one side and to hydrostatic head on the other side with opposite sides of the diaphragm having equal areas to compensate for h

Abstract: A reliable signaling device is provided which will allow an operator of a reactor vessel to ascertain when a leak has occurred in the reactor vessel rupture disc or diaphragm. The signaling device is actuated by pressure which escapes through a leak in the rupture disc. The signaling device makes the operator aware of when a rupture disc is leaking and thereby avoids a potential hazard of the reactor vessel exceeding its designed pressure rating. The signal device when modified may also be used in vacuum operations.

Abstract: A disposable, compact respiratory exerciser having a housing defining a vertically upstanding chamber attached to a base. A first opening or aperture is defined in a lower portion of the housing and connects the interior of the housing with the ambient environment. A tube is connected between a stem that surrounds and extends from a second opening or aperture defined in another portion of the housing and a mouthpiece. Guide members are positioned on an interior wall of the housing and extend vertically from the base towards the top of the housing. The second opening communicates with an air passageway defined within one of the guide members by its interior walls and a wall of the housing. The passageway opens into or communicates with the interior of the housing near the top of the housing. A piston is loosely fitted within the housing on the guide members in such manner that withdrawal of air from the housing at or above a predetermined rate causes upward movement of the piston.

Abstract: An air pressure gauge comprises a tube of rigid transparent material closed at one end and open at the other for connection to a source of pressure to be measured. The tube has graduated notches along its length and is constituted by at least two cylindrical portions connected together. One portion is adjacent the open end and the other smaller portion extends toward the closed end of the tube. A resilient piston slides in the tube and comprises a plurality of separate coaxial elements of which the outer forms a seal against the inner walls of the tube portion of greater diameter and the inner forms a seal against the inner walls of the portion of smaller diameter. The friction opposing the relative sliding between the two elements is greater than that opposing the sliding of the outer element against the inner walls of the tube portion of greater diameter.

Abstract: A pressure gauge without Bourdon tubular spring and associated traditional mechanism, which members are replaced by a simplified system comprising a plurality of differently-colored plungers slidably telescoped in one another and projecting into a transparent head memberhaving such a geometrical shape as to transmit the image of said plungers to an observer, thus indicating the amount of pressure in a container to be checked.

Abstract: An arrangement for registering pressure fluctuations in a pressure system includes a sensing element which is subjected to the fluctuations of pressure applied thereto by the pressure system. The sensing element is operatively connected with a transmitting element, which transmits signals in response to the fluctuations of pressure sensed by the sensing element. The arrangement is further provided with a register (e.g., a counter), operatively connected to the transmitting element, for registering the pressure fluctuations.

Abstract: A method and apparatus is disclosed for adjusting the resilience of a hollow ball having an internal pressure. A ball, particularly a tennis ball, is held in a confined position. A mixture of inflating medium and sealant material is injected from an aerosol container into the tennis ball. A ball test gauge is incorporated within a ball holder to enable the player to continuously and simultaneously determine the necessity for increasing or decreasing the internal pressure of the tennis ball in order to achieve the desired resilience. The frame structure is provided for fixing the storage canister or aerosol container in a stationary relationship with respect to the ball holder. A combination of elements is then provided for adjusting the internal pressure within the tennis ball.

Abstract: This invention describes a pressure gauge which is one embodiment is adapted to be continuously mounted on the valve stem of the inflated device, thereby providing a continuous indication of the pressure therein. It includes an airtight enclosure formed by an expandable means such as a diaphragm, positioned within an outer housing. The gauge is adapted to contact the standard valve stem in the inflated device to release pressurized gas from the device into the airtight enclosure. In response thereto, the airtight enclosure expands. Cooperating with this expansion of the airtight enclosure is a piston like member which includes means for controlling the expansion of the airtight enclosure. The control means is calibrated so that the piston like member moves an axial distance in an amount proportional to the pressure of the gas in the tube. The piston has an indicator band painted thereon which positions itself opposite appropriate psi markings on the outside of the housing.